Teflon is right. Those without a drag still have some means of slowing down the spool. This usually involves some type of spring and pawl arrangement, but other systems exist also. The RC model you're referring to has plenty of stopping power between the spring and pawl and rim control. If you have a major concern about the lack of a true drag, for not much more money you can buy the DC series which looks very similar, but has an actual synthetic drag.